First of all, we need to analyze the situation that the contract is only signed without seal. According to the contract law, the signature and seal of the contract must be consistent, otherwise the contract is invalid. Therefore, we need to take measures to remedy the situation that the contract is only signed without seal. We need to contact the drawer and ask if we can remedy the situation that the contract is only signed without seal. If the drawer agrees to remedy, we can sign the remedy according to the drawer's instructions. If the drawer does not agree to remedy, we need to take other measures. We need to amend the bill, and the office will sign it. When signing remedial measures, it is necessary to ensure that the signature of remedial measures is consistent with the original signature. If the signature of the remedy office is inconsistent with the original signature, the contract is invalid.